I think this "story" including banning the color white looks like some chain email stuff.Mandela's situation is a lot more nuanced, the comparison with Mugabe misses the point IMO because ANC and ZANU PF are run very differently. ANC is a much more institutionalized party because of their history in exile and how their organization was entrenched in a number of African countries that ended up falling for big man politics. Mandela was the face of the struggle and hence he is the one who seems to have been given the burden of the construction of the post Apartheid economic order. Cyril Ramaphosa,Thabo Mbeki, Chris Hani,Joe Slovo and a host of other leaders of their movement were responsible for the negotiations of how SA would look post Apartheid. Thabo Mbeki is a central figure in the policy battles of the ANC, he was the defacto ruler of South Africa 2 years after independence because Mandela wasnt a policy guy and as Deputy President Mbeki came up or pushed for most of those policies that SA adopted. Mandela had only one term where he effectively was responsible for nation building more than policy making.
Mugabe's first 15-20 years were characterized by the same overtures to the white population, he even agreed to let them have protected seats in the first parliament , retained the white head of intelligence and kept them in positions of power or influence for much of his leadership period. If i am not mistaken the Oppenheimers (owners of DeBeers) are still very large land owners in the country and Van Hoogstraten is also a very huge landowner in the country.
The comparison between the 2 countries are also way off base, SA is the largest economy on the continent whereas Zimbabwe is way smaller in comparison. Any form of ownership in an unstable or weak economy is not beneficial for anyone, for instance taking over a company when many of the skilled people have left to work in SA,Botswana, UK,US is a problem for these business owners. SA has a set up that would have fully benefited black South Africans had their economic policy been aligned with their education system, the people who have he right skills in their country including intermediate skills in manufacturing they would have benefited more.
I know more Zimbabweans across various professions who have crossed the border to work in SA simply because the returns are far higher than in their own country. One of the selling points i have seen from ZANU PF is that "blacks" will own the resources but in reality not all blacks are going to be in a position to own anything, there arent that many companies to go around millions of people and the minerals are always going to be mined by either Government affiliated companies or select foreign companies from South Africa, China and even some Indian companies that have been offered the largest steel making company in the country.